4 ms·
I am a traffic signal engineer. They don't. They may have a detector (ir-red/mircowave/inductive loop) that detects your approach. At night, as they may be no
by bmslieght 13y ago
I am a traffic signal engineer. They don't.
They may have a detector (ir-red/mircowave/inductive loop) that detects your approach. At night, as they may be no conflicting demands - the side road will change Green ASAP.
- paulbennett 13y agoDo they, or did they used to, have light sensors to detect emergency vehicles coming through? Perhaps that was just an urban myth.